La Crosse Technology WS-9626U-IT Manuel D'instructions page 18

Press to reset the maximum or minimum temperature and humidity records of the indoor or the
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currently selected outdoor channel (will reset all records to current level)
MIN/ MAX
To toggle between the maximum/ minimum outdoor temperature and maximum/ minimum indoor
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temperature data
+ key
To toggle between the "date" and "second of time" in the time display
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To make adjustment for various settings
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CH key
To toggle between the Outdoor transmitters 1, 2 and 3 (if more than 1 transmitter is used)
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To exit from the manual setting mode
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